In order to investigate the oxidative reaction pathways of dicarboxylic acids under hydrothermal condition, sebacic and azelaic acids of high molecular weight dicarboxylic acids were oxidized at 400 °C, and intermediate products were identified in detail by GC/MS, HPLC, and 1H NMR analyses. The oxidation of high molecular weight dicarboxylic acids proceeded with the consecutive oxidation of higher to lower molecular weight dicarboxylic acids through α-, β-, and γ-oxidations, as do monocarboxylic acids. The oxidation of dicarboxylic acids was also accompanied by oxidative decarboxylation, which led to the formation of monocarboxylic acids.
- Dicarboxylic acid
- Hydrothermal reaction
- Oxidation pathways
- Oxidative decarboxylation
- Supercritical water oxidation